Typewriting machine



31, 1929. w. o. M|cHEL .sEN

TYPEWRITING MACHINE 2 Sheets-Sheet lFiled Dec. 27, 1927 H S m Imm" I W Km J l@ ww g mi f f ww QN Q w S @v n. n w *a Nw wh Q wv n f,

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Dec. 31, 1929. w. o. MlcHELsEN A TYPEWRITING MACHINE Filed Dec. 27. 1927 2 Sheets-Sheet 15 tially straight Patented l Dec. 31, `11929 UNITED STATES PATENT OFFICE WILLIAM O. MICHEDSEN, F

woonHAvEN, NEW Yoan,

ASSIGNOB TO ROYAL TYPE- WRITER COMPANY, INC., 0F NEW YORK, N. Y., A CORPORATION OF NEW 'YORK TYIEWBITING MACHINE .Application tiled December 27,

This invention'relates to a type action particularly adapted for power driven machines in which there are a plurality of sliding type' bars which converge 'to a common prlntlng center and wherein each type bar is provid- `ed with a plurality of groups of two type v each. Each type bar is operated by two key levers which are adapted to selectl corresponding types of each group while the platen is shifted in the -usual o'r any desired manner to bring it intoa position to cooperate with one or the other of the ty e of each group.

The sliding type toggle mechanism which reaches a substan` line position fat the time of printing so that the actual printingis per? formed by pressure rather than by impact. Means are provided for obtaining a relative adjustment between the normal position of the platen and the type bars in order that the force of the imprmtlmay be varied as desired for manifolding. y

- One of each pair` of keys merely gives the type bar a sliding movement, while the other key in addition gives a lifting movement to a guide member'which supports the type bar in its travel ,to` the printing point, thereby lifting the bar into position to print from the corresponding type of the other group.

The invention also comprises speciic power operated mechanism for actuating the type bars by which either or both of the above de.

scribed movements are given to the operated type bar.

the construction shown in myy application Serial No. 227,997 filed Oct. 22, 1927.

Further details of the invention will be apparent from the following description and i "lo set forth in the appended claims.

ars are actuated by a.A

. respects In many respects this invention 3J is to be regarded as an improvement upon 1927. Serial No. 242,689.

Figure 4 is a side elevation of a portion of the power actuated mechanism showing the parts in full lines at the end of a depression of a key and certain parts in dotted lines at a later point in the operation of the device.`

Figure 5 is a similar view showing in full lines parts in a position subsequent to the dotted line position of Figure 4 and in dotted lines certain parts during the return movement thereof. Figure 6 is an guide.

Figure 7 is a similar view showing a modification.

' The invention may-be embodied in typewriting machines which diier widely in other and for this reason the other instrumentalities of the typewriting machine have not been illustrated. There is indicated the usual platen A which is movable to a second position indicated in dotted lines by any usual or desired form of case shift mechanism. i v,

Each type bar 1 is mounted to slide and is provided with four type a, b, c, and d When the platen is in its lower position' as shown in Flgure 1, and the type bar is given merely its longitudinal movement, it will print from the type b as shown in this figure. If the type bar is simultaneously lifted consequent upon the depression of the other key which controls the same, the imprint will be from the type d which is the lowest type of' the other group. If it is desired to print from types a or c, the platen is shifted to the dotted lineA position and the two key levers control the selection of these types in similar manner.

Each type bar 1 slides on a supporting and guiding member 2 which is pivoted at 3 to a fixed part of the machine. As clearly shown in Figures 6 and 7 this guide member is formed with bent over parts 4: at the top and bottom which engage one face of the sliding type bar and has indent projections 5 which engage the other face of the type bar. At the same time bent over ears 6 on the guide member engage the upper and lower edges of the type bar. In the modification shown in Figure 7 instead of the indented portions 1 0 levation of the type bar and venient in manufacture and to add stability to the parts and is preferable since one of the guide members passes on each side of the type bar and serves to guide the rear end thereof in its movement. lt is possible, however, to omit the web portion 10 and employ two separate parallel links or a single link member may be used.

Pivoted at 11 to the link 9 is one end of a short link 12 which together with the link 9 forms a toggle member. This link 12 is pivoted at 13 at its other end to a supporting member 14 mounted in the frame of the machine. An extension 15 from this member passes through a bar 16 carried by the machine frame into which. bar is threaded a screw member 17 having an intermediate reduced portion 18 in which fits a lug 19 projecting from the extension 15. It is obvious 'that by means of the screw 17 the position of the supporting member 14 may be changed and the effective printing position of the type bar varied. A set screw 20 holds the parts in adjusted position.

Pivoted at 21 to an ear of the link 12 is one end of a link 22 which is pivoted at its other end at 23 to a lever including a. pair of arms 24, one arm of which passes on each side of the support 14. This lever 24 is pivoted to the support 14 at 25 and one of the arms thereof is extended downwardly and forwardly at 26. The lower end of the extension is pivoted at 27 to an intermediate point of al lever 28, one end of which is pivoted at 29 to a pawl carrier 30. The other end 3l ci the lever 28 is connected by a spring 32 to a point 33 on the support 14 and this spring tends to return the parts to normal position. The extension 26 has an odset ear 34which is designed to Contact with a resilient 'stop 35 at the end ofthe operative movements of the parts. This stop is carried by an extension 36 on the supporting member 14.

The pawl carrier is loosely mounted on a constantly rotating power shaft 37 to which is rigidly fastened a ratchet wheel 38. Also loosely mounted on the shaft 37 is a member 39, one end of which is forked to engage a pin 40 eccentrically mounted on an adjustable member 41. The other end 42 of this member is provided with an inclined surface 43, the purpose of which will be hereinafter set forth Each type action is controlled by two key levers B and. C which are pivoted in the usual manner at Upon depression of the key lever ld, the type bar 1 will be moved torwardly to printingposition but will not be raised, upon depression of the key lever C the type bar will be raised and moved forwardly to printing position. A tri lever 44 is pivoted at 45 in a-frame mem er 46 and the upper endof this lever is connected by spring 47 to an angular member 48 fast to a frame portion 49. intermediate its ends the lever 44 is provided with two elongated slots videdpwith a casing 56 adapted to contain a v resilient or noiseless pad 57, the end of which may be enlarged. Pivoted tothe `pawl carrier 30 on an axis 58 is a pawl 59 having an engaging tooth 60, and a short arm 61 is also pivoted on the axis 58. A pin 62 on the pawl is connected to a pin 63 on the arm 61 by means of a'spring 64vwhich, when the parts are in the normal position, lies in a straight line approximately passing through/ the axis of thepivot 58. At this time the pin 63 engages the under edge of a fixed frame 'member 65. The upper end of the pawl car rier 30 is rovided with a sound deadening stop 66 and also with an ear 67. This pawl carrier is also provided with another ear 68 which, when the parts are in the Figure l position, engages the under side of the arm 6l. This arm is, therefore, held at this time between the fixed member and the ear 68 on the pawl carrier and cannot have any independent movemcnt at this time.

Assuming ythat the parts arein the Figure 1 position and the key B is depressed, this will pull down on the link 52 and move the trip lever 44. vThe end 57 of this lever rests on top of the pawl at this time and this movement will swing the pawl about the axis 58 so that the tooth thereof will engage the ratchet wheel 38. The parts at this time are in the full line position of Figure 4. lt will be seen that the arm 61 has not moved but that the spring 64 has moved to a position where it lies below the axis 58. It will, therefore, hold the pawlin engagement with the ratchet wheel. Since the shaft 37 and the ratchet wheel 38 are'constantly rotating in clockwise direction, the paw'l will be given a movement toward the dotted line position of Figure 4. When this position is reached the pin 63 engages 'the cam surface 43 oi' the member 42 and moves the arm 61 toward the Figure 5v position in which the 4spring 64 lies on the upper side of the axis 58. lin this movement the pawl engages an offset ear 42" on the lever izo' 39 which moves the pawl out of engagement with the ratchet, the latter part of the pawl movement being assisted by the spring 64.

Irres ective of whether or not the key lever B has een released, the pawl carrier and pawl together with all connected parts will immediately return to normal position. The dotted line position of Figure 5 shows an intermediate position of the pawl 59 and the arm G1 on this return movement. It will be noted that the pin 63 will come in contact with the ixed'member 65 and the arm 61 cannot move any farther in that direction.l

.key lever may be released at any timethereafter to permit the trip lever 44 to move to its normal position, Whereu'pon all parts will occupy the position shown in Figure 1.

lf the key lever C is depressed, precisely the same action will take place `butat this time the type bar will also be moved vertical-- ly through a tilting movement in ordertol -print from the Vcorresponding type of the v 24 has its other end normally in position to.'

the push red 7 5 will befswung lower group. This movement is attained in the following manner.

A lever 69 is pivoted t0 the frame member 49 to turn `on .theaxis 3 and an ear-70 on said lever is connected by a spring 71 to an lear 72 on the type bar guide or carrier 2. The lower end of the lever 69 has a pin 74 projecting to lone side thereof and a push rod 75 which is pivoted at one end at l76 to the lever engage the pin 7 4. lThis pushv rod 75 is connected by a link 7 7 tothe keylever B so that when this lever is depressed the push rod 75 is moved out of engagement with the pin 74 to the dotted vline position of Figure 1, and consequently said rod has an idle movement.

However, if the lever C is depressed, this will operate the. trip lever 44 through the link 53 but will have no influence upon the push rod 75 so that whenthe vtype action is operated the'movement of the lever 24 will actuate the push rod 75 and through the connections just described will rock the type guide 2 to the Figure 2 position. It is to be noted that the spring 71 is quite a strong spring but will permit continued movement ot the push rod75 after the type guide has reached the Figure 2 position. When the type guide is rocked to the Figure 2 position, it will be returned by means of a spring 7 8 connected to the member 48 and to an ear onthe type guide. l

From the foregoing, it will be observed that when it is tvpe o: or l), the' key lever B will be depressed. During' the depression of this key lever B, downwardly 24, through desired to print from either out of engagement with the pin 74 through the medium of the link 77 Simultaneously, the trip lever 44 will be swung downwardly through the medium of the link 52 and the pawl 59 will be moved into operative engagement with the ratchet wheel 38.' The pawl carrier 30 will then be swung towards ythe right. This movement ofthe pawl carrier moves the lever 28 downwardly therewith and as a result the lever 24 is rocked on its pivot25. The movement of the lever the medium of the link 22 and the toggle connection 9, 12, causes the type bar 1 to be moved forwardly to printing position to print :trom the type b when the platen is in its lower case position or to print from the type a when the platen is in its upper case position. When the pawl'59 is released from the ratchet wheel 38, the spring 32 will function to return the pawl carrier 30, the lever 28, the lever 24, the link 22toggle 9, 12, and the type bar 1 to their normal positions as shown in Figure 1. l

When itis desiredto print from either type c or d, the key lever C is depressed. Inasmuch as thepush rod 75 is not connected with the key lever C, the depression of said` key lever willv not disengage the push rod from the pin 74. Consequently, when the key lever C is depressed the operating lever 24 will be swung, the push rod 75 will be moved 'to swing the lever G9 to raise the type bar, and the toggle 9, 12 will be actuated to slide the type bar to print. The type bar is raised through the lever 69 pulling' the spring 71 which in turn rocks the pivoted support 2 until the eccentric'stop 84 engages the stop screw 81. lhus the raised position of the type bar is predetermined by the setting ofthe eccentric stop 84 and the.. screw 81. The type bar reaohesits raised position prior to the completion `of the sliding or printing movement thereof, and although the toggle 9, 12 and the push rod 75 continue to move, the push rod will have no effect on the swingu ing support 2 because permits the lever 69 to be further rocked by the push rod. rlhus, in this raised position of the type bar,'the type d maybe printed when the platen is in its lower position and the type e printed when the platen is in its upper position.

There is also illustrated means for silently stopping the rocking movement of the type guide. lin the form shown in Figure 1 there is provided a itl-shaped member 7 9 in which are threaded on opposite sides, adjustable stop screws 80 and 81. The tvpeguide has an up wardly extending arm 82 to which is loosely pivoted at 83 a circularweight 84. The pivot 83 is eccentric so that the weight normally tends to occupy a certain position.v When the parts are returned to normal position as shown in Figure 1, thescrew 80 engages one side ot the eccentric member 84 and swings it until of the spring 71 which the point engaged reaches a dead center posi-I tion. 'When the type guide is tilted, the opposite screw 8l enga-ges the other side of the eccentric member 84 and swings it in the opposite direction to the position shown in Figure 2. y

A modiiication of this construction is shown in ligure 3. 'llhere is here provided a 'trough like member 85 provided with a slotted cover 8G and the arm 82 from tue type guide 2 projects upwardly through a slot into the chamber thus formed. rlhis chamber has inclined sides S? and balls 88 are placed therein on opposite sides of the arm 82 ot the type guide. Adjustable stop screws 89 and 90 are lthreiuled into opposite sides ot the member 85 and when the type carrier is rocked, it will engage one or the other of the balls 88 and roll the same up 'the incline until it contacts with the proper stop screw 89 or 90.

lt will be noted that while the fundamental. idea is similar7 to that disclosed in my prior application.,l nevertheless quite radical changes have been made in the direction of simplifying the construction and increasing the eiiiciency of the operation of 'the device. lt is also apparent that other changes may be made in the detail construction without in any way departing from the spirit of the invention, which is to be regarded as limited only by the scope oi the aonended claimsV ll claim as my invention:

l. A type action comprising a. slidable type bar provided with a plurality of groups of type, key levers associated with the type bar and corresponding in number to the number ot groups, a movable sV '.:port for the type bar, power operated meas-. 4 controlled by the depression oi each ke" `lever for moving` the type bar to the printing point, and mechanism normally in position to loe actuated by said power operated means Jtor moving said support.

2. A type action comprising a slidable type bar provided with a plurality of groups of type, key levers associated with the type bar and corresponding in number to the number ot' `groups7 a movable support for the type ban3 power operated means controlled by the depression oit each key 'lever for moving the type bar to the printing point, mechanism normally in position to be actuated by said power operated means for moving said support, and means controlled by one key leverv for rendering said mechanism inoperative. 3. A type action comprising a slidable type bar provided `with a plurality of groups of f type, key levers associated with the type bar and corresponding in number to the number of groups, a pivoted support for' the type bar., power operated means controlled by the depression of each key lever for moving the type, bar to the printing point, and normally operative connections between said power opprensas erated means and the support for tilting the latter.1

l.. A type action comprising a slidable type 'bar provided with a plurality of groups of type, key levers associated with the type bar and corresponding in number to the number of groups7 a pivoted support for the type bar, power operated means controlled by the depression O each key lever `for moving the type liar to the printing point, normally operative connections between said power operated means and the support for tilting the latter, and means controlled by one key lever for breaking said connections. v

5. A type action comprising a slidable type bar provided with a plurality of groups of typea key levers associated with the type bar and corresponding in number to the number oit1 groups, a pivoted support i or the type bar, power operated means controlled by the depression o't each key lever tor moving the type bar to the printing point9 and normally operative connections between said power operated means and the support which include a pivoted lever yieldingly connected to the support.

G. A type action comprising a slidable type bar provided witha plurality of groups of type, key levers associated with the type bar and corresponding in number to the number ot' groups, a pivoted support for the type bar, power operated means controlled by the depression ot each key lever for moving the type bar to the printing point, normally operative connections between the power operated means and the support which include a pivoted lever yieldingly connected to the support, and means controlled by one key lever for breaking said connections.

il. t type action comprising a slidable type bar provided with a plurality ot groups of type. key levers associated with the type bar and corresponding in number to the number oi" groups, a movable support for the type bar, power operated means operative upon the depression of one of said key levers for moving the type bar to the printing point and for moving said support to select a different group, and means includinfr elements having a rolling contact for silently limiting the movement of said support.

8. Fower driving means for type bar actions comprising a constantlyrotating shaft, a ratchet wheel thereon, a pawl carrier loosely mounted on said shaft, a pawl on said carrier, key operated means formoving said -pawl into engagement with the ratchet so that the carrier will rotate with the shaft9 and a spring which holds the pawl in either operative or inoperative position.

9. Power driving means for type bar acl'mounted on the shaft, a pawl pivoted to the carrier, an arm also pivoted to the carrier on one side of the axis of the pawl and arm and tending'to hold the pawl in engagement with i the pawl and arm and normally pawl out of engagement with the ratchet, key

for moving the pawl indethe same axis as the pawl a spring connecting the pawl and arm an normally holding the pawl out of engagement with the ratchet, and key operated means for moving the pawl independentl of the arm into engagement with the-rate et wheel, the spring then lying on one side of the axis of the pawl and arm and tending to hold the pawl in engagement with the ratchet. l

10." Power driving -means for type bar ac-4 tions comprising a constantly rotating shaft, a ratchet wheel thereon, a pawl carrier loosely mounted on the shaft, a pawl pivoted to the carrier,an arm also'pivoted to the carrier on the same axis as the pawl, a spring connecting operated means lpendently of thearm into engagement with the ratchet wheel, the spring then lying on the ratchet, and means operative during the rotation of the pawl carrier for moving the arm to bring the spring to the other side ot the axis. 1 f

11. Powerdriving meansfor type bar ac- .tions comprising a constantly rotating shaft,

a ratchet wheel thereon, a pawl carrier loosely necting the pawl ratchet, key o Athe arm duringlthe rotation a pawl pivoted to the mounted on the shaft, carrier, an arm also pivoted to the carrier on lthe same axis as the pawl,fa spring connecting the pawl and arm and normally holding the pawl out of engagement with' the ratchet, key operatedmeans or moving the pawl independently of the -arm into engagement lwiththe ratchet wheel, the spring then lying on one side of the .axis of the pawl and arm 'and tending to hold the pawl in engagement with the ratchet', and fixed means engaged by of the pawl care arm `independently of the rier to move t to the other side ofl pawl to bring the spring the axis. v y i 12. Power driving means for type bar actions comprising a constantly rotating4 shaft, a ratchet wheel thereon, a pawl carrier loose- -ly mountedv onthe shaft, a pawl pivoted to the carrier, an arm also pivoted to the carrier onthe same axisas the pawl, a spring conand arm and normally holding the pawl out of engagement with the erated means for moving the pawl indepen ently of thev arm into engagement with the ratchet Wheel, the spring then lying on one side of the axis of the pawl and arm and tending to hold the pawl in engagement with the ratchet, a fixed stop for limiting the movement of the arm in( one direction, and a stop on the carrier for limiting its movement in the other direction.

13. A typel action comprising a type bar mounted for sliding andfjtilting'movements, two key leversr associated with said type bar, a movable support for the type'bar, a conholding the y bar will be moved to printing position and stantly rotating shaft, a ratchet wheel fixed l to the shaft, a pawl carrier loosely mounted on said shaft, a pawl on said carrier, connections including a lever between the pawl carrier andthe type bar'for moving the latter to printing position upon engagement of the pawl with the ratchet whee means for moving said pawlinto engagement with the ratchet wheel upon depression of either key lever, ra lever and connections between' the leverand the type bar support for tilting the 'support upon movement of the lever, a push rod ,pivotally connected to the lever of the type bar moving means andiiormally engaged with the support tilting lever whereby upon depression of one key lever the type the support tilted, and a connection between the push rod and the other key lever whereby upon depression ofsaid other key lever the push rodwill be disengaged from the support tilting lever and the t pe bar moved to printing position without ti ting said support. y v

14. A type action comprising ab type bar ymounted for sliding and tilting movements,

two key `levers associated with said type bar,

a movable support for the type bar, a constantly rotating shaft, a ratchet wheel'iixed to the shaft, a pawl carrier loosely mounted on said shaft, a pawl on said carrier, yieldable means for normally holding the awl out of engagement with the ratchet w eel,

.means for sliding the type bar to printing lever of the type bar sliding means and normally engaged with the support tilting lever whereby upon depression of one key 'lever the type bar will be moved to rinting position and the support tilted, an a connection between the push rod and the other key lever whereby upon depression o ffsaid other key lever the push rod will be disengaged from the support tilting leverandtlie type bar moved to printing position without moving said support. f

15. In a typewriting machine, the combiv nation with a type bar support mounted to swing about a xed axis, of a typebar slidably mounted on said support, and means for swinging the support and sliding the type bar including an operating lever, a lever fulcrumed on the fixed axis of the type bar support, a spring yconnecting the ast mentioned lever'and the support, a stop means for limiting the upward Swingin movement of the type bar support, a pus rod operatively connected between the levers connections between the operating leverand the ty e bar for sliding the latter, and key contro led means for actuating the operating lever.

16. In a typewriting machine, the combination with a type bar support mounted to 10 swing about a xed axis, of a type bar slidably mounted on said support, and means for swinging the support and slidin the type bar including an operating lever, a ever fulcrumed on the fixed axis of the type bar support, a spring connecting the last mentioned 1ever`and the support, a stop means for limiting the upward swinging movement ofthe type bar support, a push rod operatively connected between the levers, connections between the o erating lever and the type bar :for sliding t e latter, power means normally disconnected from the operating lever, and a key lever adapted upon depression thereof to connect the power means with the operating lever.,

In testimony whereof, I have hereunto sul)- scribed my name.

WILLIAM O. MICHELSEN. 

